<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>p5_浮动布局</title>
    <style>
        .fu{background-color: #ff0;width: 500px; height: 300px}
        .fu>div{width: 100px;height: 100px; border: 3px solid #000;}
        .z1{background-color: #f00; float: left;}
        .z2{background-color: #0f0; float: left;}
        .z3{background-color: #00f; float: right}
    </style>
</head>
<body>
   <div class="fu">
       <div class="z1"></div>
       <div class="z2"></div>
       <div class="z3"></div>
    </div>

</body>
</html>